Sewing machine



Fatented Oct. 3 1939 artisan SEWING MACHINE Oscar E. ta,

City. Mo.

Application February 15, 1937. Serial No. 125,782

This invention relates to clothing manufacture and has for its object toproduce anew method of and apparatus for the insertion of patchreinforcements to receive buttons and the like. such reinforcementsbeing placed under hems and between facing strips and the like, toresist strain and keep the buttons from pulling out. Thesereinforcements are especially desirable on overall bibs to receive thebuttons to which the shoulder straps' are detachably secured because ofthe heavy load frequently imposed at this point.

A further object of the invention is to produce a device which -I havecalled a "poker bar" for inserting such patches. For convenience of 11-lustration I show the patches as being inserted between the hemmed orfolded edge of an overall bib and its facing strip sewed to the reverseor inner face of the bib. l With the objects named in view, and othersas will hereinafter appear, the invention consists in certain noyelmethods and in the production of a device having a new arrangement orcombination of parts as hereinafter particularly described and claimed;and in order that the in- 5 vention may be fully understood, referenceis to be had to the accompanying draw ng, in which- Figure 1 is aperspective view of the top of a 2-needle sewing machine, indicating therelative positions of the two needles, an overall bib and cc facingstrip, with the device of the invention in the position it occupies whenready to feed a reinforcing patch.

' Figure 2 is a longitudinal section through the device showing thepatch folded in the position w it occupies just prior to insertionbetween the bib and the facing strip.

Figure 3 is an enlarged section similar to Figure 2, but with the patchinserted and the poker bar ready for withdrawal. an Figure 4 is a crosssection through the-top edge of a bib, its patch button reinforcementand button.

Figure 5 is a top edge view of the corner of an overail bib, as shown inFigure 4.

Figure 6 is a rear plan view of the inner side of the corner of the bibas it willappear when completed with the side edge turned back andstitched down.

Figure 7 is a perspective view of a slightly mod- 51: ified form ofpatch inserting mechanism.

In the said drawing, where like reference characters identifycorresponding parts in all of the figures, in the usual operation ofproducing a faced edge, as along the top of an overall bib,.i

' gg represents the overall bib and 2 the facing strip sewed to itsreverse or as shown in Figure 1, the bib i passing through the topfolder having a scroll 3 which turns the top edge of the bib as at 4,and the bottom folder 5 turning both edges 6 of the facing strip, suchdevices being spaced slightly in advance of the needles I. In theplacing of the reinforcement patches, it has heretofore been commonpractice to stop the machine at the desired point, fold back thematerial. and then manually tuck in or place the patch under the hem- Ihave found, however, that by setting the folders an inch or so in frontof the needles, it is possible to insert'or "poke" a patch reinforcementbetween the bib and the facing strip, since the pressure of the foldersand that of the presser foot (not shown) or feeding mechanism (notshown), of the sewing machine. holds the turned edges down so that theinsertion may be made in the manner indicated. The insertion may bemade, if desired, by manipulation of a thin strip of metal, celluloid orthe like.

In actual coommercial production, however, it has been found desirableto speed up the operation and make it positive; and to this end, I haveproduced what I term a "poker bar, as illustrated in'the accompanyingdrawing. I have, for convenience, in the main figures of the drawing,illustrated the device as a separate structure from the sewing machineitself, although as will hereinafter apr, it is to be understood thatthe poker bar might be mounted to slide directly on the table of thesewing machine or the machine may be provided with such table as shownin Figure 7. In the wing 8 indicates a base plate having a channel toreceive a reciprocatory poker bar ii, said plate having a stop lug itprojecting upwardly into a longitudinal channel or slot ii in theunderside of the sliding bar 9 to constitute a stop to limit themovement of the sliding bar in both directions so that a patch may notbe inserted beyond a predetermined distance, and to preventdisengagement of the bar from the base on its return or withdrawalmovement.

The poker bars may be held down in position in any suitable manner as byforming the base with an overlying flange I! at one edge of the bar, theother edge of said bar underlying the overhanging edge of a removablecover plate it carried by a thickened part of the plate 8. The

inner side. Ordinarily these parts are fed to a. 2-needle sewing machinefront end of the poker bar is of reduced thickness to space it from theplate to'accommodate the maximum thickness of material to be J.KRUTTSCHNITT DRILL BIT Filed Nov. 8, 1937 INVENTORT KL niumfiizr 73%,Bra- A TTORNEYS.

